A pair of Mueller's gibbons develop a taste for life in the treetops, while three endangered golden-cheeked gibbons move into the enclosure next door. Meanwhile, a specialist doctor is called in when Freddy's bowel complaint fails to improve.

A balding macaque receives protection from his troop's over-enthusiastic grooming, and the park is saddened by the death of alpha male capuchin Tom, who was at the centre for seven years. Elsewhere, the chimps are given walnuts and Jestah gets more than his fair share.